<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>实验一</title>
</head>
<frameset rows="20%,*">
    <frame src="top.html">
    <frameset cols="20%,80%">
        <frame src="left.html">
        <frame src="right.html" name="right">

    </frameset>
</frameset>

</html>